Finding the Fourth Proportional to 2,191.15, 3,287.27 and 805.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.15 : 3,287.27 = 805.24 : x
2. Step 2: Convert to fraction form
   2,191.15/3,287.27 = 805.24/x
3. Step 3: Cross multiply
   2,191.15x = 3,287.27 × 805.24
4. Step 4: Simplify right side
   2,191.15x = 2,647,041.29
5. Step 5: Solve for x
   x = 2,647,041.29/2,191.15
6. Step 6: Final answer
   x = 1,208.06